Debarking apparatus



p 7, 1948' A. P. SCHNYDER 2,443,639

' DEBARKING APPARATUS Filed Oct. 16, 1944 4 Shaets-Sheet 1 Thin]...

N INVENTOR p 1943- A. P. SCHNYDER v 2,443,689

nzamxme Arrm'rus Filed Oct. 16. 1944 r 4 Sheets-Sheet 2 INVENTOR P 1948-A. P. SCHNYDER DEBAKKING APPARATUS 4 Sheets-Sheet 3 Filed Oct. 16, 19 4INVENTOR fink f Sept.- 7, 1948. A. P. SCHNYDER 2,448,639

DEEARKING APPARATUS Filed 001:. 16, 1944 V 4 Sheets-Sheet 4 PatentedSept. 7, 1948 nsnsamc arr-mares Auxilius r. Teaneck, n. 1.

Application October 18,1944, no. smile I This invention relates to ade-bark'lns or rossing apparatus and has for an object the pro vision ofimprovements in this art.

Among the particular objects are the provision an exemplary embodiment,reference being made to the accompanying drawings thereof, wherein:

Fig. l is a top plan view; Fig. 2 is a vertical section taken on theline 22 of Fig. 1;

Fig. 3 is a transverse section taken onthe line 3-3 of Fig. 2;

Fig. 4 is a partial section taken on the line H of Fig. 2;

Fig. 5 is an end elevation; and

Fig. 6 is an axial section through the drum to show the de-barkinginstruments.

The operating mechanism is mounted on a substantial frame III which, asshown in dotted lines in Fig. 2, may be provided with wheels ll adaptingit for transportation to desired locations, as by being towed or loadedupon a trailer.

The operating mechanism comprises a rotary drum or barrel H, whichcarries the de-barking instruments, and stock feed-guide devices I! ateach end of the drum.

The drum i2 is mounted on supporting trunnions II, the drum havingannular tracks or bands which ride and guide upon the trunnions, and thedrum is held down upon the trunnions by resilient pressure rolls I whichalso ride and guide upon the tracks or bands I. The space between thetracks and trunnions is open for the passage of operating mechanismcarried by the drum and for the passage of bark outward through theopenings.

Means are provided for rotating the drum. the means shown hereincomprising a motor M mounted above the drum where it is free fromdebris, the motor driving through one or more belt strands I! passingover a grooved pulley II on the shaft of the motor and a pulley I!provided on one end of the drum.

As shown in Fig. 6, the drum is a skeleton device wherein the tracks l5near each end are connected by radial elements it with interior tubu- 4cum. (0!. 144-203) lar elements 2i, one of which carries the tubularpulley hub ll; Between the track portions there a is an intermediatedisk-like element 23 having a radial portion 24 and an'inner tubularportion 25, the outer or rim portion of element 23 and the tracks Ibeing connected by circumierentially spaced axially extending strips 26.The openings between these strips 28 provide operating space for thede-barking instruments as well as for the outward passage of the bark,removed.

Within the drum a plurality of coaxial sets of debarking instruments 2!are secured on radial arms 28 pivoted upon pins 2! on the inner tubularportion 25 of the drum. The arms 28 extend out through openings in thedrum and at the outer ends carry centrifugal weights II. The weights actpartly by centrifugal force and partly by inertia to place a resilientpressure on the debarking instruments acting radially inward toward theaxis of the drum along which the logs pass. The instruments are furtherurged inward I by springs II secured between the arms and anchorages I;on the drum. In the present embodiment there are two sets of de-barkinginstruments and three instruments in each coaxial set. The

. prising a lower driven roll 36 and an upper roll 31. With two sets ofrolls engaging the log at all times it is fed into, through, and awayfrom the drum in a horizontal position without canting.

The lower rolls 36 are mounted on arms 38 pivoted at 39 upon a stand ll.The arms ll carrying the upper rolls 31 are pivoted on the same centers.The lower arms and rolls are counter-balanced by weights 4! carried oncables 43 passing over pulleys II. The weights are suilicient to supportthe log and upper rolls and arms as well as lower'rolls and arms.Springs Q! are attached to the coimterweights to assist in supportinlogs of larger size. The upper rolls are pressed down by weights 4,included with the upper rolls in the counter-balance arrangement. Stopsa limit the upward movement of the lower rolls so they will not moveabove the central axis.

The lower rolls are driven by motors Ml having shafts coaxial with thepivots 39. One motor drives the rolls of two sets, the drive beingeil'ected through belts 41 and suitable pulleys I9, 49 on the motor androll shafts. The arms 38 of the lower rolls are adjustable in length, asat 50, to keep the belts ll tight."

The upper rolls 31 are concave along their length.' The lower rolls 36aredivided, having two inner disks 5| with spikes 36' for guiding thelog and two outer smooth disks 52 upon which the beveled ends of theupper roll restwhen a log is not present. This prevents end play betweenthe rolls.

It is thus seen that the invention provides a very simple, sturdy andefiicient de-barking device which will operate at high speed and operateupon knotty and crooked logs with substantially the same facility asupon straight logs. The logs in both guides and drum are resilientlyurged to a central. axial position where the operation is most effectiveand least vibratory.

-While one embodiment of the invention has been described for purposesof illustration it is to be understood that there may be various otherembodiments within the limits of the prior art and the scope of thesubjoined claims.

I claim:

1. A tie-barker, comprising in combination, a rotary drum provided withde-barking instruments, and log guide means at one end of said rollbeing more strongly biased toward the axis than the upper roll tosupport the weight of a log and the upper roll, means for adding biasingforce to the lower roll as it moves away from the axis, and means tolimit the upward movement of the lower roll so it will not move abovethe axis.

3. Apparatus as set forth in claim 2 which includes supporting flangeson the lower roll for rotatabiy carrying the upper roll when no log ispresent, and other flanges for carrying a log when present.

4. A de-barker, comprising in combination, a rotary drum provided withde-barking instruments, and a plurality of sets of log guide means ateach end of the drum, each set including upper and lower rolls mountedon pivoted arms. means urging said rolls together toward the axis alongwhich the log passes, said lower roll being more strongly urged towardthe log axis whereby to support the upper roll and part of the weight ofthe log.

AUXILIUS P. SCHNYDER.

REFERENCES CITED The following references are of record in the flle ofthis patent:

UNITED STATES PATENTS Number Name Date 397,114 Dolsen Feb, 5, 1889572,948 Beals Dec. 15, 1896 997,167 Werth July 4, 1911 1,248,700 OlsonDec. 4, 1917 1,539,603 Saprones May 26, 1925 1,591,017 Cook July 6, 19261,887,908 1 Tidblad Nov. 15, 1932 FOREIGN PATENTS Number Country Date40,582 Denmark -1 July 26, 1929

